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- W4386333048 abstract "Hydrologic–hydrodynamic modelling has been considered to be an important tool to understand and quantify hydrological processes of the river basins. The scarcity of the in-situ gauging network has made it a challenging task, as these with recent advancement in satellite altimetry, it may play a vital role in establishing the virtual gauges (VG) along the river stretch. In this study, HEC-RAS-based 1D/2D coupled hydrodynamic (HD) model has been set up for the stretch of around 170 km from Boudh to Naraj in the lower Mahanadi River along with two flood-prone tributaries, Kusumi and Rana. Based on the extreme flood events, the model was calibrated for the monsoon season of 2018 and, however, validated for monsoon of 2015 at daily time step. The Nash–Sutcliffe Efficiency (NSE) of 0.83 and root mean square error (RMSE) of 46 cm was estimated between simulated and observed water level (WL) for the calibration and NSE of 0.76 and RMSE of 45 cm during validation. The 04 ground tracks of Jason-2/3 satellite altimeters were identified, which cross the river. The virtual gauging stations were established at these locations to generate the rating curves (RCs) using HD model. The comparison of HD model and altimetry-based water level depicted the NSE and RMSE ranging from 0.76–0.84 to 42–88 cm, respectively. The high agreement between the two showed the potential of satellite altimetry data for the multi-site validation of HD model and constructed RCs at VG stations. This study showed the advantages of the combined use of HD model and satellite altimetry data enabling WL and RCs at multiple virtual locations in addition to existing physical ones. The proposed framework may open new perspectives for enhancing flow dynamic studies at a large scale even in remote and poorly gauged basins. Further, upcoming satellite missions like SWOT ensures detailed observations in future as well." @default.
- W4386333048 created "2023-09-01" @default.
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- W4386333048 date "2023-09-01" @default.
- W4386333048 modified "2023-10-16" @default.
- W4386333048 title "Hydrodynamic Modelling and Satellite Altimeter-Based Establishment of Virtual Gauging Network in Flood-Prone River Basin" @default.
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- W4386333048 doi "https://doi.org/10.1007/978-981-99-1890-4_3" @default.
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